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Boone County authorities said there were photos of a couple of dozen minors, and as the investigation continues the number could grow.

"I just can't even imagine -- it's shocking. It's so sad because it's out there for everyone," said Boone parent Leah Coleman.

Coleman's son is a sophomore at Boone High School.

"You just don't disrespect women by looking at pictures like that and the whole thing is degrading and awful and hopefully he doesn't get sucked into that," said Coleman.

Community members said they couldn't believe this happened when KCCI's Vanessa Peng told them what Boone police had discovered.

Boone police said they found folders on the website Dropbox that had photos and videos of nude, mostly underage girls.

"These people are under 18 -- that's the big concern," said Dan Kolacia, the Boone County attorney. "They're juveniles, they're children in essence. We want to make sure that these are shut down, that these are not going out there in the public."

Authorities said past and present high school students were in control of the accounts.

Police said more than 100 unique users had accessed the accounts, and the photos and videos were collected over a period of several years.

Boone Community School officials are warning parents about the accounts.

"Just because it's happening all over the world and in the country doesn't mean it's appropriate, and so we have to teach them what's appropriate," said Boone School Superintendent Brad Manard.

Authorities told Peng that they believe they have secured all of the accounts.

They would like the victims or anyone with information on the case to contact them as they continue to investigate the case.

Because the case is a criminal investigation, the school district is not aware of what actions police will take or the names of any victims.

Manard said in a press release that the Boone County School District is working to develop educational programs for parents and students in order to create a greater understanding and impact of what he called a "national concern."

"Across the country, we are seeing inappropriate use of such devices. Boone children are no exception to this national concern. As a school district, we take these concerns seriously," the release said.

The Boone school district and a local assault care center are offering counselling for students and families affected by the incident. There is also a 24-hour crisis line available at (800) 203-3488.

The case remains under investigation. For any additional information regarding the investigation, the public is advised to contact the Boone County Attorney's Office.